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Supported Platforms

MX Series

show chassis synchronization (MX Series Routers)

Syntax

Release Information

Command introduced in Junos OS Release 10.4.

clock-module option introduced in Junos OS Release 12.2.

Description

Display information about clocks used for chassis synchronization.

Options

clock-module

—

(MX240, MX480, and MX960 routers with Enhanced MX Switch Control Board only) (Optional) Display clock module information. You can optionally specify one of these Routing Engine qualifiers:

re0

—

Routing Engine 0

re1

—

Routing Engine 1

routing-engine (backup | both | local | master | other)

—

Routing Engine type

extensive

—

(Optional) Display clock synchronization information in detail.

interface interface-name

—

(Optional) Display clock synchronization information for the specified interface.

Required Privilege Level

maintenance

Related Documentation

List of Sample Output

Output Fields

Table 1 lists the output fields for the show chassis synchronization command. Output fields are listed in the approximate order in which they appear.

Table 1: show chassis synchronization Output Fields

Field Name	Field Description	Level of Output
Current clock status	Indicates the current status of chassis synchronization: Locked—Clock is operational. Holdover—Clock is not operational. Freerun—Clock is locked to the free-run local oscillator.	none
Clock locked to	Indicates whether the clock is locked to either the primary source or the secondary source.	none
Configured sources	Heading for the list of interfaces configured for chassis synchronization and their subsequent status indicators.	none
Source name	Indicates the configured interface that is the source. The external source name indicates the external clock interface.	none
Configured Priority	Indicates the priority configured for the interface.	none
Interface Status	Indicates the status of the interface as primary, secondary, or n/a (external).	none
Configured quality	Indicates the configured quality of the interface. prs —Primary reference source—Stratum 1 st2—Stratum 2 tnc—Transit node clock st3e—Stratum 3E st3—Stratum 3 smc—SONET minimum clock st4—Stratum 4 prc—Primary reference clock ssu-a—Synchronization supply unit A ssu-b—Synchronization supply unit B sec—SDH equipment clock	none
Interface	Indicates the configured interface: ge-fpc/pic/port—Indicates the interface type and which FPC, PIC, and port are configured.	extensive
Status	Indicates the synchronization status of the indicated interface, as follows: Primary—This interface is the selected primary chassis clock source. Secondary—This interface is the selected secondary chassis clock source. n/a—This interface is not a selected clock source.	extensive
Index	Unique numeric identifier for the established Synchronous Ethernet configuration.	extensive
Clock source state	Indicates the status of the Synchronous Ethernet clock source: Clk qualified—The Synchronous Ethernet clock source is qualified. n/a—The Synchronous Ethernet clock source is not qualified.	extensive
Priority	Indicates the configured priority. The range is from 1 through 5. The following values indicate whether the parameter is not specified or undefined: Default(8)—The parameter is not specified. - —The parameter is undefined or out of range.	extensive
Configured QL	Indicates the configured source interface quality level (QL), which is dependent on the source interface and option. The following quality levels are supported and the configured QL is indicated: prs \| st2 \| tnc \| st3e \| st3 \| smc \| st4—Network option I QLs prc \| ssu-a \| ssu-b \| sec—Network option II QLs	extensive
ESMC QL	Indicates the configured Ethernet Synchronization Message Channel (ESMC) quality level: DNU—Network option I source DSU—Network option II source	extensive
Clock source type	Indicates that the configured chassis synchronization clock source is one of the following types: ifd—Uses the free-run local oscillator. extern—Uses a configured qualified clock source.	extensive
Clock Event	Indicates the event clock status: Clock locked—Clock is established. n/a—Clock is not established.	extensive
Configuration flags	Indicates Ext for external interface configuration
Kernel flags	Indicates the Synchronous Ethernet software operational status: Up—The Synchronous Ethernet software is operational for the configured interface. pri—The source is the selected primary clock source. Dn—The Synchronous Ethernet software is not operational for the configured interface.	extensive
Ineligibility reason	Indicates the reason the interface is ineligible for the Synchronous Ethernet operation, including the following: Link Down—The link between the Synchronous Ethernet interfaces is not operational. Not restored—The Synchronous Ethernet link has not yet been restored because it is waiting for the specified wait-to-restore time to elapse. Forbidden slot—Slot 10 is not supported. Interface unit missing—The unit parameter is not set or is invalid. Locked—The paired interface is not available. No cfg—Synchronous Ethernet is not configured. RX Disabled—The receiving interface is disabled. Undefined/invalid QL—The QL mode is not specified in the configuration or, if specified, is not supported. System initialization in progress—The remote system is performing initialization and not currently available for synchronization. Unsupported interface—The configured interface does not support Synchronous Ethernet.	extensive
Clock module on	Indicates whether the clock module is on the Switch Control Board SCB0 or SCB1.	clock-module
Current role	Indicates the role of the clock module: master—The clock module is on the primary SCB, which is the active chassis clock source. backup—The clock module is on the backup SCB, which mirrors the state of the active clock.	clock-module
Current state	Indicates the state of the clock module: freerun—The clock module is in free-run mode. When the system starts up, the default clock module state is free-run. acquiring-lock on—The clock module is attempting to acquire a lock on the specified clock source. locked to—The clock module is locked to the specified clock source. holdover on—The clock module is in holdover mode on the specified clock source. Prior to the specified clock source becoming invalid, the clock module was locked on the source and holdover data was collected. holdover—The clock module has transitioned into holdover prior to locking on a valid clock source and collecting holdover data.	clock-module
Monitored clock sources	Displays information about monitored clock sources.	clock-module
Interface	Indicates the interface type and which FPC, PIC, and port are configured: external—External clock source ge-fpc/pic/port—Line Synchronous Ethernet or PTP slave xe-fpc/pic/port—Line Synchronous Ethernet or PTP slave	clock-module
Type	Indicates the type of clock source: t1—BITS T1 framed e1—BITS E1 framed 2048khz—BITS unframed 2048 KHz frequency source syncE—Synchronous Ethernet frequency source ptp—PTP slave source ptp-hybrid—PTP slave source using Synchronous Ethernet for frequency	clock-module
Status	Indicates the status of the clock source: failed—The clock source is in the failed state. qualifying—The clock source is being qualified. qualified—The clock source is qualified and can be selected as the chassis clock source. qualified-selected—The clock source is qualified and selected as the chassis clock source.	clock-module

Sample Output

show chassis synchronization

user@host> show chassis synchronization

Current clock status: Locked
Clock locked to : Primary

Configured sources
Source      Configured       Interface       Configured
Name        Priority         Status          Quality

ge-1/0/0       -             Primary         PRC

Sample Output

show chassis synchronization extensive

user@host> show chassis synchronization extensive

Current clock status: Locked
Clock locked to            : Primary

Configured sources:
Interface           : ge-1/0/0
Status              : Primary         Index : 143
Clock source state  : Clk qualified   Priority : -
Configured QL       : PRC             ESMC QL : DNU
Clock source type   : ifd             Clock Event : Clock locked
Kernel flags        : Up,pri,

Sample Output

show chassis synchronization extensive (Synchronous Ethernet with link down)

user@host> show chassis synchronization extensive

Current clock status  : Holdover
Configured sources:

Interface           : ge-1/0/2
Status              : n/a           Index       : 142
Clock source state  : n/a           Priority    : Default(8)
Configured QL       : SSU-B         ESMC QL     : DNU
Clock source type   : ifd           Clock Event : n/a
Kernel flags        : Dn,
Ineligibility reason: Link Down,

Sample Output

show chassis synchronization extensive (Synchronous Ethernet with physical interface not restored)

user@host> show chassis synchronization extensive

Current clock status  : Holdover
Configured sources:

Interface           : ge-1/0/2
Status              : n/a           Index       : 142
Clock source state  : n/a           Priority    : Default(8)
Configured QL       : SSU-B         ESMC QL     : DNU
Clock source type   : ifd           Clock Event : n/a
Kernel flags        : Restoring in 13s,ESMC TX(QL DNU/SSM 0xf),
Ineligibility reason: Not restored,

Sample Output

show chassis synchronization extensive (Synchronous Ethernet configured on ineligible slot 10)

user@host> show chassis synchronization extensive

Current clock status  : Holdover
Configured sources:

Interface           : ge-10/0/2  # Note: configuration 10/x/y (slot 10), which does not support Synchronous Ethernet
Status              : n/a           Index       : 142
Clock source state  : n/a           Priority    : Default(8)
Configured QL       : SSU-B         ESMC QL     : DNU
Clock source type   : ifd           Clock Event : n/a
Kernel flags        : Up,
Ineligibility reason: Forbidden slot,

Sample Output

show chassis synchronization interface

user@host> show chassis synchronization interface
ge-1/0/2

Current clock status  : Locked 
Clock locked to       : Primary

Sample Output

show chassis synchronization clock-module

user@host> show chassis synchronization clock-module

Clock module on SCB0
  Current role     : master
  Current state    : locked to ge-4/1/0
    State for      : 0 days, 00 hrs, 00 mins, 15 secs
    State since    : Mon Jun  6 07:29:40 2011
  Monitored clock sources
    Interface      Type         Status
    ge-4/1/0       syncE        qualified-selected
    ge-4/3/0       syncE        qualified

show chassis synchronization (configured external clock interface)

user@host> show chassis synchronization

Current clock status  : Free-run

Configured interfaces:
Name            Signal type                Rx status      Tx status
external        e1 (g704 ami sa4)          loss of signal squelched     

Configured outputs:
Interface       Tx status   Minimum QL   Tx QL
external        squelched   SEC          DNU      

Configured sources:
Source         Configured    Interface   Configured
 Name           Priority     Status      Quality
external       Default(6)    n/a         SSU-A

show chassis synchronization clock-module (configured external clock interface)

user@host> show chassis synchronization clock-module

re0:
--------------------------------------------------------------------------

Clock module on SCB0
  Current role     : master
  Current state    : freerun
    State for      : 2 days, 06 hrs, 16 mins, 57 secs
    State since    : Wed Nov 14 08:02:07 2012
  Monitored clock sources
    Interface      Type         Status
    external       e1           failed

show chassis synchronization extensive (configured external clock interface)

user@host> show chassis synchronization extensive

Current clock status  : Free-run

Configured interfaces: 

Name         : external      
Signal type  : e1 (g704 ami sa4)     
Rx status    : loss of signal
Tx status    : squelched     
LED color    : red  

Configured outputs: 
                                        
Interface      : external     
Tx status      : squelched (holdover data invalid)
Minimum QL     : SEC             Tx QL         : DNU      
Holdover mode  : enabled         Wander filter : disabled 
Source mode    : chassis         Source Tx DNU : disabled 
Holdover data  : invalid  
Current state  : holdover                           
  State for    : 2 days, 06 hrs, 03 mins, 46 secs   
  State since  : Wed Nov 14 08:02:09 2012           

Configured sources: 
                                        
Interface           : external      
Status              : n/a           Index       : 0      
Clock source state  : n/a           Priority    : Default(6)    
Configured QL       : SSU-A         ESMC QL     : DNU       
Clock source type   : extern        Clock Event : n/a      
Interface State     : Dn,ESMC Rx(SSM 0xf),
Ineligibility reason: Link Down,

Published: 2013-01-30

Supported Platforms

MX Series